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Class Information
Number: 348/695
Name: Television > Image signal processing circuitry specific to television > Dc insertion > Level inserted during keying signals (e.g., keyed clamp)
Description: Subject matter including circuitry for adding or setting the DC bias of a TV signal at selected times by a control signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7589795 |
Automatic clamping analog-to-digital converter |
Sep. 15, 2009 |
| 7468760 |
Apparatus and related method for level clamping control |
Dec. 23, 2008 |
| 7460177 |
Video signal clamping device |
Dec. 2, 2008 |
| 7184097 |
On-screen display apparatus |
Feb. 27, 2007 |
| 7126645 |
Back-porch clamp |
Oct. 24, 2006 |
| 7106231 |
Video signal processing system including analog to digital converter and related method for calibrating analog to digital converter |
Sep. 12, 2006 |
| 7106387 |
Keyed clamp circuit |
Sep. 12, 2006 |
| 6970052 |
Modulator immune from temperature variation-induced change in modulation factor |
Nov. 29, 2005 |
| 6967691 |
Color difference signal processing |
Nov. 22, 2005 |
| 6738098 |
Video amplifier with integrated DC level shifting |
May. 18, 2004 |
| 6529248 |
Method and apparatus for improved signal restoration |
Mar. 4, 2003 |
| 6339435 |
Device to automatically adjust video signals to a blanking level and method therefor |
Jan. 15, 2002 |
| 6226037 |
AKB interface circuit for kine driver IC |
May. 1, 2001 |
| 6204892 |
Circuit for clamping pedestal signal |
Mar. 20, 2001 |
| 6154256 |
Sync separator and video signal detector circuits |
Nov. 28, 2000 |
| 6008864 |
Composite video signal backporch soft-clamp system using servo loop |
Dec. 28, 1999 |
| 5995166 |
Clamp circuit for clamping a video signal and a circuit for superimposing composite video signals |
Nov. 30, 1999 |
| 5875002 |
Clamp pulse circuit |
Feb. 23, 1999 |
| 5864371 |
Luminance signal generation circuit with single clamp in closed loop configuration and horizontal synchronization pulse generation |
Jan. 26, 1999 |
| 5841488 |
Multiple video input clamping arrangement |
Nov. 24, 1998 |
| 5760844 |
Video signal data and composite synchronization extraction circuit for on-screen display |
Jun. 2, 1998 |
| 5708482 |
Image-signal clamping circuit for electronic endoscope |
Jan. 13, 1998 |
| 5686801 |
Cathode current detecting method and detecting circuit capable of correctly detecting cathode current by clamping leak current at 0 V |
Nov. 11, 1997 |
| 5677742 |
Apparatus and method for displaying a clamp point |
Oct. 14, 1997 |
| 5532758 |
Feedback clamp circuit for analog-to-digital conversion |
Jul. 2, 1996 |
| 5510854 |
Device for adjusting the black level of a video signal |
Apr. 23, 1996 |
| 5510855 |
Satellite television broadcasting receiver including improved clamping circuit |
Apr. 23, 1996 |
| 5508749 |
Sag compensation circuit for a video signal |
Apr. 16, 1996 |
| 5483295 |
Adaptive clamping circuit for video signal receiving device |
Jan. 9, 1996 |
| 5448306 |
Image processing apparatus with variable clamping |
Sep. 5, 1995 |
| 5446505 |
Color television system having broadcast program adaptive video/audio adjustment apparatus |
Aug. 29, 1995 |
| 5438558 |
Image signal apparatus including clamping processing of image signal |
Aug. 1, 1995 |
| 5410366 |
Circuit and method of clamping a video signal with first and second current sources |
Apr. 25, 1995 |
| 5343245 |
Digital clamp circuit for clamping based on the level of an optical black period of a picture signal |
Aug. 30, 1994 |
| 5343255 |
Video processing circuit with IF AGC loop, auxiliary video clamp and shared reference voltage source formed on common integrated circuit |
Aug. 30, 1994 |
| 5341218 |
Video signals clamping circuit for maintaining DC level of video signals |
Aug. 23, 1994 |
| 5339011 |
Display device |
Aug. 16, 1994 |
| 5339114 |
Television receiver with luminance signal clamped offset and re-clamped prior to contrast control for preventing black level changes with contrast control changes when displaying luminance sig |
Aug. 16, 1994 |
| 5325187 |
Image processing apparatus with back porch period sampling and clamping |
Jun. 28, 1994 |
| 5280356 |
Clamp circuit for clamping video signal including synchronizing signal at a prescribed potential |
Jan. 18, 1994 |
| 5278653 |
Methods and apparatus for digital correction of afterglow in flying spot scanners |
Jan. 11, 1994 |
| 5270819 |
Single loop analog-to-digital conversion and video clamping circuit compatible with automated diagnostics |
Dec. 14, 1993 |
| 5260794 |
Video signal processing apparatus for use with a video camera |
Nov. 9, 1993 |
| 5257108 |
Video signal processing circuit for improving contrast for an LCD display |
Oct. 26, 1993 |
| 5255095 |
DC restore circuit in a video interface for medical imaging system |
Oct. 19, 1993 |
| 5241388 |
Video signal filter method and circuit |
Aug. 31, 1993 |
| 5192885 |
Clamp circuit |
Mar. 9, 1993 |
| 5191422 |
Clamp level setting method for television signals |
Mar. 2, 1993 |
| 5182497 |
Cathode clamping circuit apparatus with digital control |
Jan. 26, 1993 |
| 5161024 |
Pixel array scanning circuitry for a solid state imaging apparatus |
Nov. 3, 1992 |
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